US2736942A - Post forming mold - Google Patents

Description

March 6, 1956 c. N. DUDLEY POST FORMING MOLD 2 Sheets-Sheet 1 Filed April 17, 1953 IN V EN TOR.

6221-2 72. Daali'ey March 6, 1956 Filed April 17, 1953 c. N. DUDLEY 2,736,942

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CarC 7?. Dzzaiey United States PatentO POST FGRMING MOLD Carl N. Dudley, Doniphan, Mo.

Application April 17, 1953, Serial No. 349,456

2 Claims. (Cl. 25-121) This invention relates to molds for cementitious articles, and more particularly to an improved mold for forming fence posts and the like.

A main object of the invention is to provide a novel and improved mold for making fence posts of cement, concrete, or other plastic material, the improved mold being simple in construction, being easy to manipulate, and enabling a post to be molded in a much shortertime than has been previously possible.

A further object of the invention is to provide an improved post forming mold for making fence postsandthe like of cement, concrete and other similar plastic material, the improved mold being inexpensive to construct, being durable, and being readily removable from the post formed therein within a short time after the plastic material has been poured into the mold without damage to the post formed thereby.

Further objects and advantages of the invention will become apparent from the following description and claims, and from the accompanying drawings, wherein:

Figure l is a top plan view of an improvedmasonry post mold constructed in accordance with the present invention.

Figure 2 is a front end elevational view of the mold of Figure 1.

Figure 3 is a perspective view of one of the triangular link members employed in the mold of Figures 1 and 2.

Figure 4 is a side elevational view of the mold of Figures l and 2.

2,736,942 Patented Mar. 6, 1956 in:Figure 5, defining 'therebetween a cavity in which a post having beveled corners may be molded. The mold elements 21 and 22 are disposed substantially parallel to each other but may be adjusted to diverge slightly at their rear portions by adjusting the transverse bar segments 15 and 17, as above described, thereby providing an upwardly tapered post. The respective longitudinal mold elements 21 and 22 are swingably connected to the respective longitudinal side bars 12 and 13 of the frame by a plurality of triangular link plates 24, each link plate 24 comprising a right triangular plate having a top hinge lug 25 and a bottom hinge flange 26, as shown in Figure 3. The plate members 24 are hinged to-therespective mold elements 21 and 22 at the hingelugs 25 and at the ends of the flanges 26, and are pivotally connected at the opposite ends of the flanges 26 to thexre'spective'longitudinal side bars12 and 13 of the frame, as shown at 27.

Designated at 28 is a transversely extending upstanding vertical mold plate which rests on the end portions of the longitudinal frame bars 12 and 13 adjacent the transverse bar segments 15 and 17, as shown in Figure l, the transverse plate member 28 being engaged by the upstanding arms 28' of anglebrackets 29 and 30 which have slotted base arms slidably disposed on the frame members 12 and 13 and are adjustably. secured thereto by bolts 31 extended through the slots in the base arms of the elements 29 and 30, said bolts being provided with wing nuts for securing the'transve'rs'e plate member 28 in adjusted position on the framebars 12 and 13 abutting the ends of mold elements 21 and 22. Secured to the intermediate portion of the top edge of the transverse mold plate 28 is a handle 32 which is employed formanually shifting the Figure 5 is an enlarged transverse vertical cross sectional view taken on the line 55 of Figure 1.

Figure 6 is an enlarged longitudinal vertical cross sectional detail view taken on the line 6-6 of Figure l.

Figure 7 is an enlarged cross sectional detail view taken on line 7-7 of Figure 1.

Referring to the drawings, the mold is designatedgenerally at 11 and comprises a generally rectangular frame having respective slightly flexible longitudinal side bars 12 and 13 which are connecte. at their ends to define the rectangular frame. Transversely connecting the ends of the side bars at one end of the frame is a transverse bar 14. Transversely connecting the other ends of the side bars are the bar segments 15 and 17. Secured on segment 15 is a bar element 16 which is received in a sleeve 16' secured to the end portion of bar segment 17 adjacent bar segment 15. As shown in Figure 7, element 16 overlies bar segment 17. A wing screw 17 is threaded through the top of sleeve 16 and is arranged to clamp element 16 against segment 17 to secure the bar segments 15 and 17 in adjusted relationship. A lock nut 18' is provided on screw 17 to lock the adjustment, as, shown in Figure 7. Thus, the bar segments 15 and 17 may be adjustably secured together to provide a desired base thickness for the post to be molded.

Designated at 21 and 22 are respective longitudinally extending upstanding vertical mold elements which are provided at their top and bottom edges with the respective angled, inwardly projecting flanges 23 and 24', as shown position of the mold plate 28 whenever required. The mold plate 28 is adjusted to abut therearve'rtical edges of the longitudinal mold elements 21and122 in the manner shoWn-in-Figure l.

Rigidly secured on the transverse bar member 14 in axial alignment With the frame is a guide sleeve 33 provided with a clamping screw 34. Adjustably disposed in the sleeve 33 is the axially extending rod member 35, said rod member being formed at its forward end with the upwardly olfsetportion 36 to which is rigidly secured the concave end mold 37, said end mold being of any desired shape, as for example, having divergent upper and lower plates 5%, 51 and being arranged to abut the forward edges of convergent triangular plate elements 52 on the ends of the longitudinal mold elements 21 and 22, as is illustrated in Figure 1.

Obviously, any desired form of end mold element may be employed on rod member 35.

The forward end portions of the longitudinal mold elements 21 and 22 are provided with handles 38 and 39 for swinging the mold elements forwardly and outwardly, as will be presently described, when the mold elements are disengaged from the fence post molded therein.

In using the device, the various mold elements are arranged in the'manner shown in Figure l, with the longitudinal mold elements 21 and 22 in abutment at their rear ends with the transversely extending vertical mold plate 28, and with the concave end mold 37 in abutment with the forward edges of the triangular elements 21 and 22. As above described, the transverse bar segments 15 and 17 are adjusted to provide the desired base thickness for the fence post to be molded. The device is supported on a suitable fiat surface, such as a board, or other surface from which the molded post can be readily removed after it has hardened. With the mold device arranged as above described, the mixture of plastic material is poured therein, said mixture being, for example, semiplastic concrete of substantial consistency. The mixture is placed in the mold to fill the same, and may be tamped from the open top of the mold.

Within a short period of time, of the order of between ten and twenty minutes, the sides 21 and 22 may be detached from the post. This is done by first releasing the clamping screw 34, whereby the end mold 37 may be moved away from the molded post sufficiently to allow the side mold elements 21 and 22 to be swung forwardly, as shown in dotted view in Figure 1. The handles 38 and 39 are used for moving the longitudinal mold elements 21 and 22 forwardly, and as will be apparent from Figure 1, the longitudinal mold elements 21 and 22 leave the molded post with a forward, troweling action; whereby the molded fence post is not damaged by the removal of the longitudinal mold elements 21 and 22. After the longitudinal mold elements 21 and 22 have been thus disengaged from the molded fence post, the remainder of the mold may be lifted away from the fence post, to be employed for molding the next post.

While a specific embodiment of an improved postforming mold has been disclosed in the foregoing description, it will be understood that various modifications within the spirit of the invention may occur to those skilled in the art. Therefore, it is intended that no limitations be placed on the invention except as defined by the scope of the appended claims.

What is claimed is:

1. In a post mold, a rectangular rigid frame having spaced longitudinal side members and cross members at the ends of said side members and extending therebetween, a pair of longitudinal mold members positioned between said side members, links extending between each mold member and a related frame side member, the links being pivoted to the frame side members and the mold members on axes extending at right angles to the plane of said frame whereby endwise movement of the mold members in opposite directions moves the mold members toward and away from each other and toward and away from the cross members of the frame, a relatively stationary transverse abutment plate on said frame adjacent to one of said cross members with which the related ends of the mold members are engageable in one position of the mold members, and a post and molding member mounted on the other frame cross member, said end molding member being movable endwise longitudinally of the frame for engagement with and withdrawal from engagement with the other ends of the mold members.

2. In a post mold, a rectangular rigid frame having spaced longitudinal side members and cross members at the ends of said side members and extending therebe tween, a pair of longitudinal mold members positioned between said side members, links extending between each mold member and a related frame side member, the links being pivoted to the frame side members and the mold members on axes extending at right angles to the plane of said frame whereby endwise movement of the mold members in opposite directions moves the mold members toward and away from each other and toward and away from the cross members of the frame, a relatively stationary transverse abutment plate on said frame adjacent to one of said cross members with which the related ends of the mold members are engageable in one position of the mold members, and a post end molding member mounted on the other frame cross member, said end molding member being movable endwise longitudinally of the frame for engagement with and withdrawal from engagement with the other ends of the mold members, means mounting said transverse abutment plate on the frame side members for adjustment longitudinally of the frame.

References Cited in the file of this patent UNITED STATES PATENTS 785,272 Robbins Mar. 21, 1905 874,366 Layfield et al. Dec. 17, 1907 1,125,958 Burwell Jan. 26, 1915 FOREIGN PATENTS 898,723 France July 17, 1944

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